How to use this calculator
- Enter your monthly electricity bill and the rate per kWh from it.
- Set how much of your use happens during the day.
- Type the system size and the installed cost per kW from the quotes you have.
- Adjust the sun hours, efficiency and export value if you have better numbers.
- Read the payback period, the monthly savings and the 10-year result.
Is home solar worth it in the Philippines?
With some of the highest electricity rates in Southeast Asia, many Filipino households look at rooftop solar. The idea is simple: make your own power in the day and buy less from the grid.
The answer depends on your bill, your daytime use and the price of the system. This calculator lets you test a few system sizes and see the payback before you ask for quotes, so you can compare offers with confidence.
Check the cost details in our solar power cost guide, trim your usage first with the aircon cost calculator and review the electricity bill calculator.
How the solar estimate works
- Your monthly electricity use is your bill divided by your rate per kWh.
- Solar output equals the system size times the sun hours times 30 days times the efficiency.
- Power used at home saves your full rate. Extra power sent to the grid earns the lower export value you enter.
- Payback is the system cost divided by the yearly savings.
Tips to save more
- Cut waste first. A smaller bill needs a smaller system.
- Get at least three written quotes and compare the brands and warranties.
- Ask how the net metering application is handled.
- Check the roof condition before you install.
Frequently asked questions
How long does it take for solar panels to pay back in the Philippines?
It depends on your bill, the system price and how much power you use during the day. Higher bills and daytime use shorten the payback.
What size system do I need?
Divide your monthly kWh by about 100 to 120 kWh per kW to get a rough size. An installer can survey your roof and your usage.
Do I need net metering?
Net metering lets you export extra power to the grid for credit. Ask your installer and your distribution utility about the program, the approval steps and the export rate.
Does solar work during a blackout?
A grid-tied system without batteries shuts off for safety during an outage. A hybrid system with batteries can keep some loads on.
Are these prices current?
They are examples. Prices vary by brand, installer and roof, so get several written quotes.
Helpful guides and deals
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This calculator gives estimates for planning only. It is not financial, tax or legal advice. Confirm exact figures with your employer, bank, lender or the relevant government agency.